CVE-2022-43622: d-link dir-1935 Stack-based Buffer Overflow

Vulnerability summary

CVE-2022-43622 is a high (CVSS 8.8) Stack-based Buffer Overflow vulnerability in d-link dir-1935. EPSS estimates a 0.99% chance of exploitation in the next 30 days, higher than 62.2% of scored vulnerabilities.

Timeline

1. 29-03-2023
   PublishedVulnerability first disclosed.
2. 18-02-2025
   Last modifiedVulnerability information updated.

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-1935 1.03 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of Login requests to the web management portal. When parsing the HNAP_AUTH header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-16139.

• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).